CIE A Level Chemistry复习笔记1.3.6 Metallic Bonding

Metallic Bonding: Definition

  • Metal atoms are tightly packed together in lattice structures
  • When the metal atoms are in lattice structures, the electrons in their outer shells are free to move throughout the structure
  • The free-moving electrons are called ‘delocalised electrons’ and they are not bound to their atom
  • When the electrons are delocalised, the metal atoms become positively charged
  • The positive charges repel each other and keep the neatly arranged lattice in place
  • There are very strong forces between the positive metal centres and the ‘sea’ of delocalised electrons


The positive metal centres are suspended in a ‘sea’ of delocalised electrons